Sunstroke and heatstroke

Spending too much time at a high temperature can cause dehydration. This can cause a sunstroke. A sunstroke can develop into a heatstroke. This is a life-threatening condition in which the body is unable to regulate its temperature.

Symptoms of a sunstroke

• headache
• dizziness
• nausea or vomiting
• muscle cramps
• fatigue
• pale, clammy skin
• dilated pupils
• normal or slightly raised temperature    

Symptoms of a heatstroke

• headache
• high fever, sometimes up to 41 °C
• nausea
• warm, dry, red skin
• constricted pupils
• a fast pulse and difficulty breathing

Ultimately, confusion and loss of consciousness can occur. The risk is greater for young children, the elderly and people with health conditions.